Rainbow-electronics MAX5480 Manual do Utilizador descarregar pdf (Página 5)

MAX5480

8-Bit Parallel DAC in

QSOP-16 Package

_______________________________________________________________________________________ 5

INTERFACE LOGIC

S7 S6

20kΩ 20kΩ 20kΩ 20kΩ

10kΩ

D6 D5

D0 (LSB)

D7 (MSB)

20kΩ

10kΩ

REF

10kΩ

OUT2

OUT1

RFB

Figure 3. MAX5480 Functional Diagram

NOTES:

1. FOR THE MAX5480, ALL INPUT SIGNAL RISE AND FALL TIMES ARE MEASURED

FROM 10% TO 90% OF V

. V

= +5V, t

= t

= 20ns.

2. TIMING MEASUREMENT REFERENCE LEVEL IS (V

+ V

) / 2.

DATA IN

(D7–D0)

DATA IN

STABLE

Figure 4. Write-Cycle Timing Diagram

Table 2. Unipolar Binary Code Table Table 3. Bipolar (Offset Binary) Code Table

NOTE LSB V V

REF REF

: 1 2

256









( )

−

NOTE LSB V V

REF REF

: 1 2

128









( )

−

DIGITAL INPUT

MSB LSB

1 1 1 1 1 1 1 1

1 0 0 0 0 0 0 1

ANALOG OUTPUT

1 0 0 0 0 0 0 0

0 1 1 1 1 1 1 1

0 0 0 0 0 0 0 1

0 0 0 0 0 0 0 0

DIGITAL INPUT

MSB LSB

1 1 1 1 1 1 1 1

1 0 0 0 0 0 0 1

ANALOG OUTPUT

1 0 0 0 0 0 0 0

0 1 1 1 1 1 1 1

0 0 0 0 0 0 0 1

0 0 0 0 0 0 0 0

-V

255

256

REF













-V

129

256

REF













-V

128

256

REF













= −

REF

-V

127

256

REF













-V

256

REF













-V

256

REF













= 0

127

128

REF













128

REF













-V

128

REF













-V

127

128

REF













-V

128

REF













1 2 3 4 5 6

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